Abstract: The display panel includes a plurality of light-emitting areas and a plurality of non-light-emitting areas, the plurality of light-emitting areas being space apart from each other by the plurality of non-light-emitting area; light-emitting elements each located in one of the plurality of light-emitting areas and including an anode and a cathode that are opposite to each other, and a light-emitting layer located therebetween; a cover layer covering a light-emission side of the light-emitting element. The cover layer includes a substrate and first dopants doped in the substrate, the first dopants are magnetic. When an external magnetic field intensity applied to the cover layer is changed by an amount greater than a preset magnetic field intensity, the first dopants in the substrate are rearranged from a first mode to a second mode.

Abstract: An OLED display panel, a manufacturing method thereof and a display device are provided. The OLED display panel includes an OLED display substrate and an encapsulation layer for encapsulating the OLED display substrate. The OLED display substrate includes a flexible base substrate, and a TFT layer, a planarization layer and an OLED element layer arranged sequentially on the flexible base substrate. At least one layer of the encapsulation layer, and at least one of the flexible base substrate or the planarization layer, are polymer material layers each doped with flexible nano-composite glass fibers.

Abstract: A thermistor-based thermal probe includes a thermistor die having a thermistor thereon with first and second bond pads coupled across the thermistor, and first and second die interconnects coupled to the respective bond pads. First and second wires W1, W2 that extend beyond the thermistor die are attached to the first and to the second die interconnects, respectively. An encapsulant material encapsulates the thermistor die and a die end of the first and second wires.

Abstract: A determination is made whether read/write is enabled within the tape drive storage unit. In response to determining that read/write is enabled, a determination is made whether a temperature within the tape drive storage unit exceeds a threshold value. In response to determining that the temperature within the tape drive storage unit exceeds the threshold value, a determination is made of a direction of travel of a tape media within the tape drive storage unit. In response to determining that the direction of travel is a forward direction, a first cooling device is powered on. The first cooling device lowers the temperature of a first guide roller and the tape media coming off a first tape storage reel prior to the tape media passing by a read/write head within the tape drive storage unit.

Abstract: Systems and methods are disclosed for timing servo operations within a channel based on a counter for a disc locked clock. In certain embodiments, an apparatus may comprise a servo channel configured to lock a frequency of a servo channel clock to a rotational velocity of a disc data storage medium, and maintain a counter of clock cycles for the servo channel clock. The servo channel may perform operations to read servo data from a servo sector on the disc data storage medium at a first counter value selected relative to a target counter value corresponding to an expected location of a servo timing mark (STM).

Abstract: A patterned magnetic recording medium for use in heat assisted magnetic recording comprises an electrically conductive heat sink layer and a plurality of discrete magnetic recording elements positioned adjacent to a first surface of the heat sink layer. Disc drives that include the patterned medium and a method of magnetic recording using the patterned media are also included.

Abstract: A device comprising a detection mechanism to detect a medium; a pre-head to slide on a magnetic strip formed on the medium to read magnetic data; a shutter that opens and closes in response to the result of the detection mechanism; a card processor to process information recorded on the medium; and a magnetic field generating device which may include a magnetic field generator to generate a magnetic field by a resonance unit; and a drive control circuit to control driving of the magnetic field generator. The drive control circuit may include a power supply, a reference potential circuit, and a resonance drive circuit.

Abstract: To realize an electric field-driven type ferromagnetic resonance excitation method of low power consumption using an electric field as drive power, and provide a spin wave signal generation element and a spin current signal generation element using the method, a logic element using the elements, and a magnetic function element such as a high-frequency detection element and a magnetic recording device using the method. A magnetic field having a specific magnetic field application angle and magnetic field strength is applied to a laminate structure in which an ultrathin ferromagnetic layer sufficiently thin so that an electric field shield effect by conduction electrons does not occur and a magnetic anisotropy control layer are directly stacked on each other and an insulation barrier layer and an electrode layer are arranged in order on an ultrathin ferromagnetic layer side.

Abstract: A magnetic sensor device may include a magnetic sensor element structured to detect a magnetic property of a medium. The magnetic sensor element may include a sensor core having a body part and one or a plurality of protruded part(s) which is protruded from the body part, an exciting coil which is wound around the sensor core, and a detection coil which is wound around the sensor core. The body part and the protruded part of the sensor core forms an open magnetic path, and a stepped part is formed on a side face of at least one piece of the protruded part.

Abstract: A first portion of a track identifier is read from a first servo wedge of a track of a magnetic disk. A second portion of the track identifier is read from a second servo wedge of the track. The second portion includes least-significant bits of the track identifier that are also stored in the first portion. The first and second portions are combined to determine the track identifier for the first and second servo wedges, and the track is identified using the track identifier.

Abstract: Provided herein is an apparatus, including a servo pattern having magnetic features, wherein each magnetic feature of the magnetic features includes a single magnetic domain; a first population of the magnetic features; a second population of the magnetic features; and a selective magnetization means for selective magnetization of either one of the first population or the second population of magnetic features over the other.

Abstract: Disclosed is an analog-digital converter which includes a pre-amplifier configured to output a comparison result between a sampled analog input signal and a reference signal and to control a power supply operation in response to a power control signal; a digital signal processor configured to generate a digital signal based on the comparison result; a power controller configured to generate an amplifier operation clock signal for controlling the pre-amplifier; and a counter configured to count the number of falling edges of the amplifier operation clock signal and to detect a power interruption point of time of the pre-amplifier according to the counted falling edge number. The power controller generates the power control signal for interrupting a power to be supplied to the pre-amplifier when the power interruption point of time of the pre-amplifier is detected.

Abstract: A system and method for magnetic transfer. A magnetic transfer device includes a plurality of pairs of magnetic field generating units that apply a magnetic field to a contact body which includes a master disk in close contact with a magnetic recording medium, wherein the master disk has a pattern of preformatted signals. The magnetic field generating units, falling within a specified length range, are moved in synchrony at a predetermined speed in the directions of the outer periphery while the contact body is caused to rotate by a rotation drive unit. The system and method provide a magnetic transfer method and a magnetic transfer device that, by reducing the area of magnetic field generating units that apply a transfer magnetic field, can reduce an attractive force (or repulsive force) between the magnets, and furthermore, shorten a processing time for the transfer.

Abstract: The controller includes a deflection signal generator for generating a deflection signal for causing the electron beam to deflect and perform overwriting so that a beam spot of the electron beam follows the translation of the substrate over a period during which the substrate is rotated over a predetermined number of overwriting cycles; and a data output unit for outputting the drawing data, wherein, the deflection signal generator generates a deflection adjustment signal for irradiating the electron beam at a starting position for drawing a concentric circle to be subsequently overwritten after a predetermined deflection adjustment period has elapsed since overwriting of concentric circles based on the drawing data has completed.

Abstract: An electron beam writing method for writing a fine pattern that includes servo patterns and groove patterns, the method including the step of adjusting an exposure amount of the resist by changing, when controlling application timing of the electron beam by an ON/OFF signal to a blanking unit that blocks the electron beam, an application duty ratio of the electron beam by the ON/OFF signal with respect to each writing radius position for each pattern based on sensitivity variation data of the resist with respect to post exposure delay for each pattern.

Abstract: A master disk for batch transferring of predetermined information recorded therein to a magnetic recording medium includes a substrate transmitting laser light, and convex portions provided on the substrate and formed of material reflecting or blocking the laser light. The convex portions have a pattern corresponding to the predetermined information.

Abstract: A method of magnetic transfer, including placing a first medium in contact with a second medium, pressing the first and second media together to form an adhered body, applying a magnetic field to the adhered body, and moving the magnetic field relatively to the adhered body, so as to transfer information from the first medium to the second medium. Then the monitoring of the adhered body is performed to detect existence of an air bubble between the first and second media.

Abstract: A magnetic transfer device and method are provided. A magnetic field generating structure comprises a pair of permanent magnets connected to a return yoke. Respective magnetic poles of the magnets, of a different polarity from one another, oppose each other with a conjoined body disposed therebetween. The magnetic field generating structure is moved from a position at an outer periphery of the conjoined body, to a position at an inner periphery of the conjoined body, and then moved from the position at the inner periphery across the conjoined body toward the outer periphery, to a position outside of the conjoined body. The return yoke is positioned at a radially more outward position, toward the outer periphery, than are the permanent magnets. The movement of the magnetic field generating structure is carried out while maintaining a constant distance from the rotating conjoined body.

Abstract: A magnetic transfer method includes a conjoined body formation step of stacking a transfer master storing transfer information on a transfer receiving body. Air between contact surfaces of the transfer master and transfer receiving body is pushed out in the direction of a non-pressurized area by pressurizing the stacked transfer master and transfer receiving body, to form the conjoined body. The method further includes a transfer step of, by bringing a magnetic field generating module close to the conjoined body, and applying a magnetic field, carrying out a magnetic transfer of the transfer information from the transfer master to the transfer receiving body. A surface roughness of smooth portions of the transfer master in which no transfer information is formed, and the surface roughness of the transfer receiving body, is 1 nm or less.

Abstract: A magnetic transfer master substrate may have a ferromagnet pattern corresponding to a signal array. The substrate may include a non-magnetic base having depressed portions, formed on a surface thereof, which correspond to the signal array. A ferromagnet may be disposed in the depressed portions and includes a portion protruding above said surface. A section through the portion of the ferromagnet protruding from said surface taken perpendicularly to a surface of the substrate, includes a curved corner, a radius of curvature of which is no less than 2 nm and no more than 10 nm. The ferromagnet protrudes from the surface of the base by a distance no less than 2 nm and no more than 15 nm. A magnetic transfer method may include bringing the master substrate and a magnetic recording medium into contact and applying a magnetic field to record a magnetization pattern.

Abstract: The servo master includes a membrane having a first surface and a second surface; a plurality of stamp areas which are disposed on the first surface, each of the plurality of stamp areas including a magnetic layer patterned with servo patterns to be magnetically transferred to a magnetic recording medium; and a pressing members which are disposed on the second surface, each of the plurality of pressing members being operable to apply pressure to a corresponding stamp area of the plurality of stamp areas.

Abstract: A method of forming a servo track on a recording medium includes; forming a magnetic layer, defining a first servo track region having a plurality of first magnetic segments and a second servo track region having a second plurality of magnetic segments in the magnetic layer, applying a first magnetic field to induce a first magnetization direction in the first and second pluralities of magnetic segments, forming first magnetic patterns, each having a first width, and second magnetic patterns, each having a second width different from the first width, on a first side of a substrate, disposing the substrate on the recording medium, such that the first magnetic patterns are aligned in correspondence with the plurality of first magnetic segments and the second magnetic patterns are aligned in correspondence with the plurality of second magnetic segments, and applying a second magnetic field to the recording medium to selectively induce a second magnetization direction into first selected ones of the first plurali

Abstract: A system and method for magnetic transfer. A magnetic transfer device includes a plurality of pairs of magnetic field generating units that apply a magnetic field to a contact body which includes a master disk in close contact with a magnetic recording medium, wherein the master disk has a pattern of preformatted signals. The magnetic field generating units, falling within a specified length range, are moved in synchrony at a predetermined speed in the directions of the outer periphery while the contact body is caused to rotate by a rotation drive unit. The system and method provide a magnetic transfer method and a magnetic transfer device that, by reducing the area of magnetic field generating units that apply a transfer magnetic field, can reduce an attractive force (or repulsive force) between the magnets, and furthermore, shorten a processing time for the transfer.

Abstract: A magnetic transfer apparatus and method includes air supply for supplying air into a space above a peripheral portion of a double-sided slave disc beyond a second master disc in an air-tight chamber formed when a first disc holder holding a first master disc and the slave disc in contact and a second disc holder holding the second master disc are brought into contact with each other so as to hold and sandwich the slave disc between the first and second master discs, the air supply being controlled to take place at least either during formation of the air-tight chamber or during opening the air-tight chamber.

Abstract: A portable card adapted to interact with a data processing station when the portable card and the data processing station are moved relative to each other is disclosed. The portable card includes a substrate having a predetermined shape, e.g. rectangular. An accessible embedded storage member is enclosed within said substrate. The storage member includes at least one layer of storage material for storing information in a predetermined format for processing by the data processing station. The storage member and the substrate are adapted to be transported relative to each other to expose at least a portion of the storage member to the data processing station to facilitate processing of stored information and for embedment of the storage member within the substrate. The storage member may be in the form of an elongated strip member, or a circular member.

Abstract: A portable card adapted to interact with a data processing station when the portable card and the data processing station are moved relative to each other is disclosed. The portable card includes a substrate having a predetermined shape, e.g. rectangular. An accessible embedded storage member is enclosed within said substrate. The storage member includes at least one layer of storage material for storing information in a predetermined format for processing by the data processing station. The storage member and the substrate are adapted to be transported relative to each other to expose at least a portion of the storage member to the data processing station to facilitate processing of stored information and for embedment of the storage member within the substrate. The storage member may be in the form of an elongated strip member, or a circular member.

Abstract: The present invention provides a magnetic transfer master carrier which forms a magnetic pattern corresponding to a pattern of information to be recorded on a perpendicular magnetic recording medium when a magnetic field is applied to the perpendicular magnetic recording medium, with the magnetic master carrier and the perpendicular magnetic recording medium closely attached to each other, the carrier including: a base material having convex portions on its surface, the convex portions being provided corresponding to the pattern of information; a magnetic layer deposited on at least top surfaces of the convex portions, and having perpendicular magnetic anisotropy; and a soft magnetic layer deposited on the surface of the magnetic layer.

Abstract: A magnetic transfer master carrier of the present invention includes a base material having convex portions on its surface, the convex portions being provided corresponding to a pattern of information to be recorded on a perpendicular magnetic recording medium, and a magnetic layer deposited at least on top surfaces of the convex portions, wherein when a magnetic field is applied to the magnetic transfer master carrier, the magnetic layer absorbs a magnetic flux so as to form a pattern of the magnetic field, wherein the magnetic layer includes at least two perpendicular magnetic anisotropic layers, and an antiferromagnetic coupling induction layer which is provided so as to be sandwiched in between two neighboring layers of all the perpendicular magnetic anisotropic layers, and to induce antiferromagnetic coupling therebetween.

Abstract: A method of magnetic transfer, including placing a first medium in contact with a second medium, pressing the first and second media together to form an adhered body, applying a magnetic field to the adhered body, and moving the magnetic field relatively to the adhered body, so as to transfer information from the first medium to the second medium. Then the monitoring of the adhered body is performed to detect existence of an air bubble between the first and second media.

Abstract: A pattern transfer apparatus includes a storage-medium-surface detecting unit that detects a foreign substance or defect on a surface of a storage medium and specifies a position and a size of the foreign substance or defect; a relative-position adjusting unit that adjusts a relative position on a contact surface between the surface of the storage medium and a transfer pattern surface of a transfer master, and a relative-position-adjustment instructing unit that calculates an adjusted value of the relative position according to a detection result, and instructs the relative-position adjusting unit to adjust the relative position based on the adjusted value.

Abstract: A magnetic transfer device and method are provided. A magnetic field generating structure comprises a pair of permanent magnets connected to a return yoke. Respective magnetic poles of the magnets, of a different polarity from one another, oppose each other with a conjoined body disposed therebetween. The magnetic field generating structure is moved from a position at an outer periphery of the conjoined body, to a position at an inner periphery of the conjoined body, and then moved from the position at the inner periphery across the conjoined body toward the outer periphery, to a position outside of the conjoined body. The return yoke is positioned at a radially more outward position, toward the outer periphery, than are the permanent magnets. The movement of the magnetic field generating structure is carried out while maintaining a constant distance from the rotating conjoined body.

Abstract: A magnetic transfer method includes a conjoined body formation step of stacking a transfer master storing transfer information on a transfer receiving body. Air between contact surfaces of the transfer master and transfer receiving body is pushed out in the direction of a non-pressurized area by pressurizing the stacked transfer master and transfer receiving body, to form the conjoined body. The method further includes a transfer step of, by bringing a magnetic field generating module close to the conjoined body, and applying a magnetic field, carrying out a magnetic transfer of the transfer information from the transfer master to the transfer receiving body. A surface roughness of smooth portions of the transfer master in which no transfer information is formed, and the surface roughness of the transfer receiving body, is 1 nm or less.

Abstract: A holder unit for use in a transfer apparatus that causes a surface of a transfer master and a surface of a slave medium to be in direct contact with each other and transfers information on the transfer master surface to the slave medium surface. The holder unit includes a pair of gripping members, movable toward and away from each other, for holding the transfer master. The transfer master is stuck firmly on either or both of the pair of gripping members through or without an elastic member.

Abstract: To provide a magnetic transfer method including: initially magnetizing a perpendicular magnetic recording medium in a perpendicular direction; closely attaching a magnetic transfer master carrier to the initially magnetized perpendicular magnetic recording medium; transferring magnetic information to the perpendicular magnetic recording medium by applying a perpendicular magnetic field which acts in the opposite direction to the direction of the initial magnetization, with the perpendicular magnetic recording medium and the magnetic transfer master carrier closely attached to each other; and separating the magnetic transfer master carrier, which is closely attached to the perpendicular magnetic recording medium, from the perpendicular magnetic recording medium, wherein in the separating, the magnetic transfer master carrier is separated from the perpendicular magnetic recording medium while applying another perpendicular magnetic field which acts in the opposite direction to the direction of the initial magne

Abstract: The present invention provides a magnetic transfer method comprising: a magnetic transfer step of applying a magnetic field for transfer parallel to the plane of a disk shaped substrate having formed on the surface thereof a pattern composed of magnetic layer arrangement corresponding to information to be transferred to a perpendicular magnetic recording medium while a master recording medium for perpendicular magnetic transfer being the substrate is brought into close contact with the perpendicular magnetic recording medium, and thereby transferring the magnetic pattern of the master recording medium for perpendicular magnetic transfer to the perpendicular magnetic recording medium; and a servo correction information writing step of writing by use of a magnetic head, servo correction signal information into a section adjacent to the information transferred to the perpendicular magnetic recording medium by the magnetic transfer step.

Abstract: The present invention provides a method of initializing a perpendicular magnetic recording medium in which a magnetic field having a magnetic field strength Hex is applied to a perpendicular magnetic recording medium having a magnetic layer having a coercive force Hc to initialize the magnetic layer, the method comprising the steps of: controlling a magnetic field strength HexP in a direction parallel to the medium surface of the magnetic field so that HexP>1.3×Hc; and controlling a magnetic field strength HexV in a direction perpendicular to the medium surface of the magnetic field so that HexV<Hc.

Abstract: A magnetic transfer master carrier including a base material having, in its surface, convex portions arranged correspondingly to a pattern of information to be recorded on a perpendicular magnetic recording medium, and a magnetic layer having perpendicular magnetic anisotropy, the layer being provided on top and side surfaces of the convex portions, wherein the magnetic transfer master carrier forms a magnetic field pattern corresponding to the pattern of the information when a magnetic field is applied thereto.

Abstract: A master carrier for magnetic transfer, has: a support having an information writing region where a projection transfer pattern having a first projection is formed, the first projection corresponding to information to be transferred onto a magnetic recording medium; and a magnetic layer on the transfer pattern of the support, wherein the master carrier has a second projection on a surface of the support and the second projection is formed in a region where the information writing region isn't formed to sustain the region where the information writing region isn't formed while the magnetic recording medium and the support are brought into intimate contact with each other.

Abstract: A master is used for writing information to a magnetic recording disk by a magnetic transfer method. The recording disk includes a magnetic recording layer possessing vertical magnetic anisotropy. The master includes a servo zone corresponding part formed with a magnetic material pattern for recording servo information to the recording layer of the recording disk. The master also includes a user data zone corresponding part formed with a second magnetic material pattern for providing the recording layer of the recording disk with a dummy signal.

Abstract: The present invention provides a magnetic transfer master carrier which forms a magnetic pattern corresponding to a pattern of information to be recorded on a perpendicular magnetic recording medium when a magnetic field is applied to the perpendicular magnetic recording medium, with the magnetic master carrier and the perpendicular magnetic recording medium closely attached to each other, the carrier including: a base material having convex portions on its surface, the convex portions being provided corresponding to the pattern of information; a magnetic layer deposited on at least top surfaces of the convex portions, and having perpendicular magnetic anisotropy; and a soft magnetic layer deposited on the surface of the magnetic layer.

Abstract: To provide a magnetic transfer master carrier obtained by forming a perpendicular magnetic anisotropy magnetic layer over a surface of an original master which has a concavo-convex pattern, placing a base material against the formed perpendicular magnetic anisotropy magnetic layer, and separating the base material.

Abstract: A magnetic transfer master carrier of the present invention includes a base material having convex portions on its surface, the convex portions being provided corresponding to a pattern of information to be recorded on a perpendicular magnetic recording medium, and a magnetic layer deposited at least on top surfaces of the convex portions, wherein when a magnetic field is applied to the magnetic transfer master carrier, the magnetic layer absorbs a magnetic flux so as to form a pattern of the magnetic field, wherein the magnetic layer includes at least two perpendicular magnetic anisotropic layers, and an antiferromagnetic coupling induction layer which is provided so as to be sandwiched in between two neighboring layers of all the perpendicular magnetic anisotropic layers, and to induce antiferromagnetic coupling therebetween.

Abstract: A production method of a magnetic transfer master carrier, the method including forming an imprint resist layer on a surface of a magnetic layer of a laminate which includes a first base material and the magnetic layer laminated thereon; forming a resist pattern, following shapes of concave portions of a mold, on the surface of the magnetic layer by pressing the concave portions against the imprint resist layer; and forming magnetic convex portions on the first base material by removing the mold from the imprint resist layer and then etching a surface of the magnetic layer which surface has no resist pattern, wherein the mold includes a second base material and the concave portions formed by etching a surface of the second base material so as to correspond to a pattern of information to be recorded on a magnetic recording medium

Abstract: A magnetic transfer method including initially magnetizing a disc-shaped perpendicular magnetic recording medium by applying, to the recording medium in a circumference direction, a magnetic field whose direction is inclined at an angle within a range of ±50° with respect to a perpendicular line (0°) to the medium surface, closely attaching a concavo-convex pattern of a magnetic transfer master carrier to the recording medium, and transferring magnetic information to the magnetic layer of the medium by applying a magnetic field to the recording medium and the master carrier closely attached to each other, wherein the concavo-convex pattern includes transfer portions on which surfaces a magnetic layer corresponding to the magnetic information is laid, and non-transfer portions which are concave portions, and wherein the magnetic layer has perpendicular magnetic anisotropy, a residual magnetization Mr of 500 emu/cc or lower, and a saturation magnetization Ms of 900 emu/cc or higher.

Abstract: A magnetic transfer method including initially magnetizing a perpendicular magnetic recording medium by applying a DC magnetic field thereto in a perpendicular direction, and applying, to the perpendicular magnetic recording medium, a DC magnetic field for 100 nsec to 1 sec in an opposite direction to the magnetic field applied in initial magnetization with the recording medium being closely attached to a magnetic transfer master carrier which transfers magnetic information to the recording medium with being brought into contact with the recording medium, wherein the master carrier includes transfer portions on which surfaces a magnetic layer corresponding to magnetic information is laid, and non-transfer portions which are concave portions lower in height than the transfer portions, and wherein the magnetic layer has perpendicular magnetic anisotropy and has a residual magnetization Mr of 500 emu/cc or lower and a saturation magnetization Ms of 900 emu/cc or higher.

Abstract: A magnetic transfer method comprises the processes of: adhering a side having a perpendicular magnetic recording layer of a perpendicular magnetic recording medium in which a perpendicular magnetic recording layer is formed on a surface of a disk shaped substrate, to a surface of a master recording medium in which a magnetic layer is formed corresponding to information to be recorded for transferring information to the perpendicular magnetic recording medium and of the side having the magnetic layer formed; and performing magnetic transfer by relatively rotating a magnetic field application device about the center of the perpendicular magnetic recording medium as an axis with respect to the perpendicular magnetic recording medium and the master recording medium, while applying a magnetic field to the perpendicular magnetic recording medium and the master recording medium by the magnetic field application device, wherein the magnetic field application device is rotated two or more times.

Abstract: A master for magnetic transfer is provided that obtains favorable close contact with a slave medium, is capable of good positioning therewith, and prevents positional misalignment, damage, and separation failures. The master carrier is formed to have surface properties such that a frictional characteristic value F/P·A is within a range from 173 to 24/cm2, and preferably within a range from 112 to 45/cm2, when the master carrier and the slave medium are placed in uniform close contact with a contact area A, a vertical load P is applied, the master carrier and the slave medium are pulled in their planar directions, and the maximum static friction at this time is designated as F. It is also preferable that a hard protective layer of DLC film is formed on the surface of the master carrier, and that a lubricant is provided on the hard protective layer, as necessary.

Abstract: A contact magnetic transfer (CMT) master template has a flexible plastic film with a planarized top or upper surface containing magnetic islands separated from one another by nonmagnetic regions. The flexible plastic film is secured at its perimeter to a silicon annulus that provides rigid support at the perimeter of the film. The plastic film is preferably polyimide that has recesses filled with the magnetic material that form the pattern of magnetic islands. The upper surfaces of the islands and the upper surfaces of the nonmagnetic regions form a continuous planar surface. The nonmagnetic regions are formed of chemical-mechanical-polishing (CMP) stop layer material that remains after a CMP process has planarized the upper surface of the plastic film.

Abstract: The present invention provides a master disk for magnetic transfer which has a disk-like outer shape and in the surface of which a large number of fine magnetic layer patterns are formed, wherein the relationship between the outside diameter size d (mm) of the extreme outer circumference of the magnetic layer pattern and the master disk thickness t (mm) is given by 2.04×10?3×d+0.006?t?8.15×10?3×d+0.024, in order to exclude the effects of bows, strains and thickness deviations of a master disk in performing magnetic transfer and ensure that accurate transfer of magnetization patterns can be performed.

Abstract: An amplitude servo pattern capable of providing accurate servo control through reproduced amplitude with reduced noise is provided. The amplitude servo pattern has servo burst signals composed of burst bit strings adjacently disposed in a track width direction. The burst bit strings are disposed such that the servo burst signals adjacently disposed in the track width direction have a phase difference with each other in a track direction.